11. Each time they pass through the identification world line . 12. The singularity is an end point in time, as in the world lines terminate at it. 13. Offering holding line for AMs and world lines . 14. During the 1991 Gulf War, the West and part of the Muslim world lined up against Iraq. 15. The momentarily co-moving inertial frames along the world line of a rapidly accelerating observer ( center ). 16. The relativistic length equal to, future-directed and tangent to the world line of the object in spacetime. 17. Deciduous trees from around the world line many of the parks, giving a display of autumn colour. 18. This is because world lines change from being time-like outside the static limit to being space-like inside it. 19. We also have two sets of null geodesics spiralling into two different events on the green world line . 20. As the world lined up against the rigidly Islamic Taliban, Musharraf moved to bring Pakistan's militant Muslims in line.
